What does this tool do?
Binary Converter instantly translates numbers between binary, decimal, hexadecimal and octal, and also encodes plain text into binary, hex and ASCII codes. It's a handy companion for students, programmers and electronics hobbyists.
How to use it
- Enter your configuration details.
- Review the generated output.
- Copy the ready-to-use code or file.
Four bases, one live view
Type a value in any field and the other three update automatically: enter decimal 42 and you instantly see binary 101010, hex 2A and octal 52. Each input validates its own character set, so the binary box accepts only 0 and 1 while the hex box accepts 0-9 and A-F. A summary line for the decimal value can be copied in one click with the 0b, 0x and 0o prefixes included.
Encoding text to binary and hex
Type a word into the lower section and each character's ASCII code point is shown in three formats: 8-bit binary (for example 'A' = 01000001), two-digit hexadecimal (41) and decimal (65). It's ideal for learning character encoding, visualising the bits of a byte, or manually decoding short data fragments byte by byte.
Frequently asked questions
Can I convert negative numbers?
The decimal field accepts a minus sign, but the binary, hex and octal results follow JavaScript's standard radix representation. For the most predictable output, work with positive integers.
Does hex input care about letter case?
No. You can type a-f or A-F in the hex field, and results are displayed in uppercase for consistency.
Does the text encoder support non-English characters?
Each character uses its Unicode code point, so accented and special letters are converted too; because they can exceed 8 bits, their codes are longer than plain ASCII characters.
Is Binary Converter free?
Yes. Binary Converter and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. Binary Converter works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.